| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.lang.reflect.Field; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.taskdefs.ExecuteWatchdog; |
| import org.apache.tools.ant.taskdefs.optional.junit.JUnitTask; |
| import org.apache.tools.ant.util.Watchdog; |
| |
| public class JStackJUnitTask extends JUnitTask |
| { |
| private Integer timeout; |
| |
| public JStackJUnitTask() throws Exception |
| { |
| } |
| |
| @Override |
| public void setTimeout(Integer timeout) |
| { |
| this.timeout = timeout; |
| super.setTimeout(timeout); |
| } |
| |
| @Override |
| public ExecuteWatchdog createWatchdog() throws BuildException |
| { |
| return new JStackWatchDog(timeout); |
| } |
| |
| private static class JStackWatchDog extends ExecuteWatchdog |
| { |
| private long pid; |
| |
| public JStackWatchDog(long timeout) |
| { |
| super(timeout); |
| } |
| |
| public JStackWatchDog(int timeout) |
| { |
| super(timeout); |
| } |
| |
| @Override |
| public synchronized void start(Process process) |
| { |
| this.pid = getPid(process); |
| super.start(process); |
| } |
| |
| @Override |
| public synchronized void timeoutOccured(Watchdog w) |
| { |
| if (pid > 0) |
| { |
| ProcessBuilder pb = new ProcessBuilder("jstack","-l", String.valueOf(pid)); |
| try |
| { |
| Process p = pb.start(); |
| try (BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()))) |
| { |
| StringBuilder sb = new StringBuilder(); |
| String line; |
| while((line = br.readLine()) != null) |
| { |
| sb.append(line).append("\n"); |
| } |
| System.out.println(sb.toString()); |
| } |
| } |
| catch (IOException e) |
| { |
| System.err.println("Could not get stack for "+pid); |
| e.printStackTrace(); |
| } |
| } |
| super.timeoutOccured(w); |
| } |
| |
| private long getPid(Process process) |
| { |
| if (process.getClass().getName().equals("java.lang.UNIXProcess")) |
| { |
| try |
| { |
| Field f = process.getClass().getDeclaredField("pid"); |
| f.setAccessible(true); |
| long pid = f.getLong(process); |
| f.setAccessible(false); |
| return pid; |
| } |
| catch (IllegalAccessException | NoSuchFieldException e) |
| { |
| System.err.println("Could not get PID"); |
| } |
| } |
| return -1; |
| } |
| } |
| |
| } |